Background: I want to extend the existing C# language using a VSIX-plugin with highlightning support (optional IntelliSense-support) and a custom pre-processor to allow some custom-defined syntactic sugar (e.g. new keywords, custom operators, special pre-processor constants etc).
I know one can create a new syntax editor using C# and this MSDN Tutorial series, but I am wondering, how one can extend the existing C# language editor using a VSIX-extension.
Does anyone has a link to a blog/example of such a project?
I also know, that it is possible to access the Roslyn syntax-tree using VS2015, but I am not quite sure how to use it without extending the Roslyn compiler itself (see this SO thread)